/* -*-c++-*- */
/* osgGIS - GIS Library for OpenSceneGraph
 * Copyright 2007-2008 Glenn Waldron and Pelican Ventures, Inc.
 * http://osggis.org
 *
 * osgGIS is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>
 */

#ifndef _OSGGIS_COLLECTION_FILTER_STATE_H_
#define _OSGGIS_COLLECTION_FILTER_STATE_H_ 1

#include <osgGIS/Common>
#include <osgGIS/FilterState>
#include <osgGIS/CollectionFilter>
#include <osg/Node>
#include <map>

namespace osgGIS
{
    /* (internal class - no public docs)
     * State object for filters derived from CollectionFilter.
     *
     * Please refer to FilterState for more information on filter state objects.
     */
    class CollectionFilterState : public FilterState
    {
    public:
        CollectionFilterState( CollectionFilter* filter );

        FilterStateResult traverse( FilterEnv* );
        virtual FilterStateResult signalCheckpoint();

        void push( Feature* input );
        void push( const FeatureList& input );
        void push( Fragment* input );
        void push( const FragmentList& input );
        void push( AttributedNode* );
        void push( const AttributedNodeList& nodes );

    protected:
        osg::ref_ptr<CollectionFilter> filter;
        //osg::ref_ptr<FilterEnv> saved_env;
        
        FeatureList features;
        FragmentList fragments;
        AttributedNodeList nodes;
    };
}

#endif // _OSGGIS_COLLECTION_FILTER_STATE_H_
